CSEC Integrated Science · May/June 2010 · Paper 2

50 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)(i)1 markState ONE reason for the transport system in the child.
2. 1(a)(ii)1 markState ONE reason for the transport system in the plant.
3. 1(b)2 marksName TWO processes responsible for the movement of water at Y and Z in Figure 1B.
4. 1(c)(i)3 marksOn Figure 1A, use THREE arrows to show how blood is circulated through the child's body.
5. 1(c)(ii)3 marksOn Figure 1B, use THREE arrows to show how water moves into and out of the plant.
6. 1(d)1 markName the organ that pumps blood through the human body.
7. 1(e)1 markOn Figure 1A, place a point G at the possible centre of gravity of the sleeping child.
8. 1(f)1 markDraw an arrow at G to show the direction of gravity on the body.
9. 1(g)2 marksState TWO features of the circulatory system that allow blood to move from the child's leg to the heart.
10. 2(a)3 marksName TWO household pests that may be present in the dining room if left overnight as in Figure 3, and give a reason for their presence.
11. 2(b)2 marksDescribe ONE way in which the pests named in (a) affect humans.
12. 2(c)2 marksGive TWO methods for controlling household pests.
13. 2(d)1 markMosquitoes are carriers of dengue fever. Based on Figure 4 showing the Smiths' backyard, identify ONE object which may encourage mosquito breeding.
14. 2(e)1 markSuggest ONE way the Smiths may assist in reducing the incidence of dengue fever, given there is no medicine to treat the virus.
15. 2(f)2 marksName TWO other diseases spread by mosquitoes.
16. 2(g)2 marksWater from rainfall is collected from the roof in containers. Name TWO impurities that may be present in this water.
17. 2(h)2 marksSuggest TWO ways by which Mrs. Smith can make the water collected in the containers safe for drinking.
18. 3(a)(i)1 markWhat is the effect of weightlifting on the muscles of the body?
19. 3(a)(ii)1 markSuggest ONE benefit of aerobics and running that CANNOT be gained from weightlifting.
20. 3(b)(i)2 marksSophia's coach recommended eating more lean meats, peas, rice, and sweet potatoes. What are the TWO food groups in her new diet?
21. 3(b)(ii)2 marksState ONE function of EACH of the food groups named in (b)(i).
22. 3(c)(i)1 markGive ONE reason why Sophia breathes faster when she is running.
23. 3(c)(ii)1 markGive ONE reason why Sophia's heart beats faster when she exercises.
24. 3(d)(i)2 marksSophia's father joins her exercises. Name ONE physical factor, other than fitness, which he must consider, and give ONE reason for your answer.
25. 3(d)(ii)2 marksAfter one month, the amount of fat around Mr. Pierre's waist decreased. Explain how this fat was used by his body.
26. 3(e)3 marksWhat are THREE possible negative effects on Sophia's body if she uses steroids for performance enhancement?
27. 4(a)3 marksIdentify the group member with the MOST stable equilibrium and state TWO reasons for your answer.
28. 4(b)4 marksComplete rows (i), (ii) and (iii) in Table 1 to show the correct stimulus, sense organ, or major coordinating role during the rehearsal.
29. 4(c)2 marksExplain how energy is obtained and used in producing movements for the group members during their rehearsal.
30. 4(d)2 marksLabel parts L and M on Figure 6, showing the internal structure of the eye.
31. 4(e)(i)1 markJenny's grandmother holds the newspaper at arm's length when reading. What is the most likely cause of this condition?
32. 4(e)(ii)2 marksState TWO ways of correcting this vision defect.
33. 4(f)1 markWhat is ONE precaution that Jenny can take to prevent damage to her eyes while reading late into the night?
34. 5(a)(i)1 markWhat is the function of an electricity meter?
35. 5(a)(ii)1 markWhat is the reading on the meter shown in Figure 7?
36. 5(a)(iii)1 markThe reading of the meter on 01 June 2008 was 22 943 kWh. Calculate the amount of electricity used during the month of June.
37. 5(a)(iv)2 marksCalculate the cost of electricity for the month of June if the cost is 70 cents for every kWh of energy used.
38. 5(b)(i)2 marksComplete Table 2 to show the missing values at (a) and (b).
39. 5(b)(ii)3 marksState THREE measures which the family can implement to reduce energy consumption.
40. 5(b)(iii)2 marksExplain which is more cost effective: using the fan for twelve hours instead of six hours OR using the toaster oven for two hours.
41. 5(c)1 markDistinguish between a 'switch' and a 'fuse'.
42. 5(d)2 marksState the energy changes that take place when an electric toaster oven is used in homes powered by solar energy.
43. 6(a)2 marksExplain the concept of the conservation of linear momentum.
44. 6(b)(i)2 marksState TWO possible results of this collision.
45. 6(b)(ii)1 markCalculate the momentum of the truck if it was moving at a speed of 4 m/s towards the trolley.
46. 6(b)(iii)2 marksState TWO possible results of the collision between the truck moving at 4 m/s and the trolley.
47. 6(c)(i)2 marksDefine the term 'energy' and state the unit of energy.
48. 6(c)(ii)1 markWhat is the symbol for the unit of energy?
49. 6(d)3 marksState the forms of energy present (i) before, (ii) during, and (iii) after the trolley collides with the stationary toy truck.
50. 6(e)2 marksThe toy truck possesses gravitational potential energy. Explain where this energy comes from.